| 摘要 |
An electronic circuit for interfacing a sensor of either current sourcing or current sinking type to a data bus requiring signals of predetermined characteristics, the circuit including first and second level comparators set to different reference levels so as to define a window between the reference levels at which neither comparator is actuated. A sensor input terminal is biased to a level between the reference levels of the comparators, but varies to a level outside the window in response to current flowing from or into the sensor terminal. The comparator output terminals are connected to an output circuit which produces a signal suitable for transmission on the data bus in response to actuation of either comparator.
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